List a few non over used sci fi trops? Story content is much like guitar chords, there are only so many combos and they get used over and over again.
The move to a new galaxy is just fine and dandy to me. The last game of the last series set out a few major massive constraints that a team would have to follow if they 'stuck to it'. Including all major constraints is simply not feasible, so you either choose one and tick off most of your audeicne or go you totally new.
Sci fi is all about hand waving. At what point does one think certain tech is fine and other tech is outlandish or not feasible? Almost everything in sci fi is feasible, it is just that people institute opinions of likes and dislikes and try and work those into being feasible or not?
And I think that is exactly what you are doing in your post.